I do not want to start judging others by whether they fly or don't fly, drive cars or don't drive cars, or live in the city or don't live in the city. There are too many variables involved to judge one another simply on one or two lifestyle choices. I think it best to focus on how each of us can lower our own carbon footprint and give serious consideration to, if not eliminating, at least reducing your air travel.
But, we also cannot leave it there. We must also continue to educate ourselves and the public and take action to stop our government from subsidizing pollution and personally take responsibility to actively promote alternative forms of transportation. We are all passengers on this planet Earth and, as far as I know, it still remains the only spaceship we have. Let's keep up the maintenance necessary to sustain this planet for ourselves and future generations.
Cheap air travel adding to global warming woes
What is the environmental cost of flying? | Environment | The Guardian
Amtrak Position Paper http://www.trainweb.com/advocate/2002/lbpaper.html
U.S. Transportation Subsidies
NARP: National Association of Railroad Passengers